Device for compressing air



(No Model.) v 3 Sheets-Sheet 2. T. O. PERRY. DEVICE EOR GOMPRESSINGAIR.v

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THE mums paens co, Pnorourno.. WASHINGTON. n. c.

3 Sheets-Sheet 3. Y

(No Model.)

T.O.PERRY. DEVICE POR COMPRESSING AIRt ifm ,T 72973.

Patented June 6 Mw. w1. AU 9,.:

i NITED STATES PATENT OFFICE.

THOMAS O. PERRY, OF CHICAGO, ILLINOIS.

DEVICE FOR COMPRESSING AIR.`

SPECIFICATION forming part of Letters Patent No. 498,989, dated'J une 6,1893.

Application filed September 5| 1891. Serial No. 404,853. (No model.)

To all whom t may concern.-

Be it known that I, THOMAS O. PERRY, a citizen of the United States,residing at Chicago, county of Cook, and State of Illinois, haveinvented certain new and useful Improvements in Devices for CompressingAir, which are fullyset forth in the following speciication, referencebeing had to the accom panying drawings, forming a part hereof.

The principal or central feature of this invention relates toair-compressing mechanism, and this may be used by being operated by awindmill or any other suitable motor; but, specifically, it is adaptedto and is most useful in connection with a windmill, and its connectiontherewith constitutes a specific feature of my invention.

In the drawings, Figure 1 is a sectional side elevation of a windmilllhaving my said invention connected therewith. Fig. 2 is an enlargedsection of the aircompressor at the line 2 2 on Fig. 1. Fig. 3 is anenlarged section of the same at the line 3 3 on-Fig. 2. Fig. Ltis adetail edge elevation of the wheel designed to be operated by the airblast. Fig. 5 is a detail section of a portion of the air compresserpiston and operating connection, thus illustrating a modified form ofthe devices in the connections for preventing over pressure. Fig. 6 is aside elevation of the compressor of a form which may be used at adistance from the windmill or other source of power, and showing,therefore, a different forni of connection to its piston rod from thatin thel other igures,wherein the com pressoris mount-` ed on thewindmill frame. Fig. 7 is an axial section through the compressor shownin Fig. 6. Fig. 8 is a section at the line 8 8 on Fig. 7. Fig. 9 is adetail perspective of a special form of piston intake valve which Iemploy.

A represents conventionally a windmill, of which A' is the shaft, whichis mounted in a bearing frame A3, which is shown secured on the top of asupport conventionally represented at A3.

A4 represents a crank wheel rigid with the shaft A' of the windmill. 0,4is the crank wrist on said wheel. B is a pitman connected to said crankwrist and operating the piston of the compressor. K

C is the compressor cylinder. D is the piston in said cylinder. Thecylinder is open at AVhereinafter appear.

the lower end. and discharges at its upper end through the port c',which is controlled by the check valve C', which seats downward oversaid port in the vestibule C2 of the eduction pipe E.

D' is the intake check valve of the piston, which closes the intake portCZ', seating downward over said port. The particular construction ofthis valve and mode of retaining it in its place will be hereinafterdescribed.

The piston in the form illustrated and preferred is made up of twoprincipalparts, the disk or head plate D3, and the bottom plate D3,which has a Vcylindrical extension D30,

which forms an extended bearing and guide for the piston in thecylinder.V These parts are rabbeted around their proximate edges,forming a peripheral channel to receive packing material D4. They aresuitably bound together by screw bolts d4.

D5 is a short shaft or bolt which extends diametrically across thepiston a short distance below the head within the cylindrical extensionD30, and having its ends seatedor lodged loosely in bosses D31 D31,formed at diametri-V cally opposite points on the inner surface of thecylindrical extension D30. This bolt or shaft serves as the pivot atwhich the pitman B is connected to the piston. Said pitman has at itsend designed for such connection the eye B', elongated in the directionof the length of the pitman, so that it has longitudinal play on thepivot D5. The intake valve D', being central with respect to the pistonhead, is directly over the pivot boltD, and therefore directly above theend of the pitman eye B' when the pitman is connected; and the stem ofthe valve is extended downward far enough so that when the pitman ishanging on the pivot,-that is to say, when the pivot bolt is at theupper end of the opening in the elongated eye B',-said stem, when thevalve is on its seat, reaches almost to the pitman; in practice, asixteenth of an inch interval between the yend of the valve stem and theend of the pitman in the positiondescribed is sufficient for the purposewhich will The pitman is expanded laterally toward its upper end for adistance below the eye B', and apertured at its said expanded part, or,to describe the construction otherwise, the pitman is forked at itsupper IOO end, the two forked arms B B10 being connected across theirends by the eye B', an opening being made into the said eye on the underside corresponding to and at the end of the space between the forkedarms B10.- In this space there is lodged the coiled spring G, whichreacts at its lower end againstthe pitman and at its upper end againstthe pivot D5, tending, therefore, to hold the pitman :in such positionWith respect to the pivot that the latter will be at the uper end of theopening in the elongated eye. The purpose of this construction of thepiston and its connection to the pitman I will describe beforeproceeding with the description of the remainder of the mechanism.

The ordinary operation of the pump is obvious. ters through the portclin the piston past the intake valve D', and fills the cylinder abovethe piston. When the piston is raised,-that is, is given its forcingstroke,the intake valvev is seated by the interior pressure and theairis forced out pastthe check valve C into kthe eduction pipe E, andthence to What-l everdevice or chambersaid pipe leads to. Obviously, ifsaid pipe leads to a closed chambery-as to the chamber of aWater-elevatingappliance operated by compressed`air,`that being'one oft-he uses to which thisfconstructionisadapted-and the outlet or pipefrom such chamber should be accidentally obstructedor if there should bean obstruction in the pipe E, the continued action of "the pump Wouldeventually burst the cylinder orl the chamber to which the compressedai-rwas conducted by thefpipe or would force the packing of the pistonor otherwise find a vent. To'fprevent such a result is the purpose ofthe specific'construction above described. The effect of thisconstruction is that when the resistanceto the discharge of air, byreason of any obstruction beyond the check valve C', isv such asftoproduce in the cylinder above the piston such acompressed condition ofair therein as to resist the upward movement of the'piston with forceenough to compress the spring G, an-amount equal to the distance betweenthe end of the stem of the Valve Dand theend of the pitman,-sayafsixteenth of an inch,-the pitman Will encounter the end ofl the valvestem and any further compression of the spring which will result fromany fur-V y ther attempted movement of the pitman against the interiorpressure, will cause the pitman to lift the valve D', and therebyrelieve the pressure inv the cylinder so that the piston maymove-freelynotwithstanding any obstructionbeyond the cylinder. Themaximum degree of compression that a compressor fitted with thisappliance will produce in a closed chamber Will therefore be measuredaccurately by the resistance of the spring G,and this maybe made asdesired according to the Work to be done. I have not shown any devicefor adjusting the tension of this spring, but such devices will occur toany mechanic,

Vdirectly by the piston-actuating part.

When the piston is depressed, air cn and the mode of their applicationwill be obvious.

It will be apparent that it is not essential that the valve D should beactuated in the manner described directly by the pitman, or, treatingthe pitman as representing merely any part which actuates the piston, itis not necessary that the Valve should be actuated It is only essentialthat it should receive its actuation ultimately from such movement asthe piston-actuating part obtains with respect to the piston by reasonof the resistance in the cylinder to the pistons movement being greaterthan the resistance of the spring which is interposed somewhere betweenthe piston-actuating partvand the piston, so that the resistance to thepistons movement in the forcing stroke is transmitted through the springto the actuating part.

Fig. 6 represents'a modification in Which the piston isV actuateddirectly by a stem h, and not by the pitman proper. It will beunderstood that the stem may be actuated'in any manner.v In theconstruction shoWnin 'this figure, also, the stem is holloW and con-"the hubd on the piston at one end and the boss b on thel stem at' theotherend of the IThe tubular stem b, extendingv up through the hub d toWithin the required distance of the stem of the valve D', a pin or boltcl2, set through the hub d and passing through an elongated opening Z'inthe stem b, serves as the connection by which the piston stem retractsthe piston, theforcing'stroke being communicated, as in the constructionshown in the principal figures, by the spring G.

In Figs. 7 and 8, I have shown thesame feature of invention applied to acompressor which is adapted tobe mounted at a position distant from themill which operates-it,-as upon a fixed support II,-the stem B B beingrigid with the piston and havinga guide-bearing 7a outside of thecylinder and being actuated bythe cross-head J, connected by the yoke Jto the'rod J2, which may or may not be the pitman,-that is, Which hasthe necessary reciprocating movement, with or Without the oscillatingmovement of apitman. In this construction, the stein has the boss b b ata short distance above the point Where the crossheadstands, and thespring is inter osed between'the hub j of thecross-head an the said bossbb, the pin or bolt d2, as in the form shown in Fig. 6, serving toconnect the cross-head to the stem, passing through the slots bzin saidstem, as seen in Fig. 8. The stem in thisconstruction, being rigid withthe piston and thereby vincapable of longitudinal movement with respectto the same, the movement of the piston-actuating part,-towit: thecross-head J,-With respect to the piston when the spring G yields, ismade to actuate the valve D by' means of the rod K, located Within thetubular stem B B, said rod resting upon or being IOO IIO

held in position by the pin d2 (the pin `may pass through the rod or therod may merely rest upon the pin when the cylinder is vertical and theforcing stroke is upward, but in any other position the pin should passthrough the rod as illustrated.) The rod `terminates at its upper end atthe same short distance from the end of the stem of the valve D asexplained in respect to the other constructions. The rod will move withthe cross-head when the latter moves with respect to the piston stem,and will therefore communicate such relative movement to the valve Dunder the same circumstances as suchmovement would be communicated bythe stem in the construction shown in Fig. 6, or by the pitman in theconstruction shown inthe principal iigures. These three constructionsare illustrated to indicate what I regard as the scope of this featureof my invention, which is not limited to either one but broadly includesthem all, though that which I have shown in the principal figures isgenerally possible, and when possible is most desirable.

I will now describe another important feature of my invention,-iirst,explaining the necessity or desirability of it. It is useful chiey whenan air-compressing device is associated with and operated by a windmill,but has utility whenever the motive power is variable. The speed of windwhich must be taken into account in a practical device for utilizing itvaries from the gentlest breeze that will produce any movement of themill, to the most violent gale that the mill can withstand. Thepotential energy of wind,- that. is, the Work which it may accomplishwith proper appliances,-varies as the cube of its velocity; but thespeed of a windmil1,exccpt as effected by the work it is doing and theresistance which it th us encounters,can only vary as the Velocity ofthe wind. When, therefore, the mechanism to be driven is connecteddirectly to the mill, the speed, and, consequently, ordinarily, the workof that mechanism will vary only as the velocity of the wind varies.Thus, if a wind of a given velocity a causes a given mechanism attachedto a mill driven by such wind to perform an amount of work b, the samemechanism driven bythe same mill, when the velocity is 2 could performonly work represented by 2", Whereas the potential energy of the wind ofdouble velocity would be 8b, the difference between the work performedand the work which might be performed, 6b, being lost for lack ofadaptation in the appliances to utilize it. This same loss would occurwhether the connection from the mill to the work were mechanical, in theordinary sense of that term, as by pitman, gear or chain, or

such as might be afforded by an air duct from` the compressor operatedby the mill, the air in that case merely serving as the connection bywhich the power is transmitted. But the feature of my invention which Iam about to describe enables me when employing such compressor and airduct as means of transmitting the power from the mill to the Work, toutilize substantially the entire potential energy of the wind whichdrives the mill between any minimum and maximum limit which maybedetermined upon in the construction of the apparatus.

It will be obvious that the work done by each stroke of the piston inthe air compressor, making no allowance for leakage, will vary as thecross-areas of the cylinder,that is to say, as the square of itsdiameter. If, therefore, the diameter of the cylinder could be increasedas the Velocity of the wind increases, the work done could be made tovary as the cube of the velocity, thereby utilizing the whole potentialenergy. Or, if the length of the compressing stroke `of the piston inthe cylinder could be made to vary as the square of the velocity,y thesame result might be attained. What I accomplish is equivalent tovarying the length of the compressing stroke, and I have suggested thesetwo impracticable methods of utilizing the whole energy of the windmerely to make clear the result which I attain by the practicable methodwhich I will now describe. Assuming, for example, that the minimum speedof wind which can be made or which it is Worth while to make availablefor the accomplishment of work is eight miles an hour, and that themaximum wind which the mill and its supports is adapted to withstandwith safety'is one which has a velocity of twenty-four miles per hour,so that the maximum work which can be accomplished is twenty-seven timesthe minimum, I provide the cylinder C with an aperture c at a distancefrom the upper end of the cylinder equal to one-ninththe entire strokeof the piston, and I make the diameter of the cylinder such that theminimum velocity of wind .which it is designed to utilize,-viz: eightmiles an hour,-will afford sufficient power to compress to the minimumtension which will perform useful work the air which will be confined bythe piston after it passes the aperture c in its upward stroke. beobserved that at that portion of the stroke, the leverage of the crankwheel on the pitman is greatest, for the crank wrist is just thenapproaching and about to pass the center, so that at that position agiven velocity,

of the wheel will be capable of producing the greatest compression thatcan be produced at any part of the stroke, `and much greater than thatwhich can be produced midway in the stroke where the leverage is least.In a mild wind, tending togive the piston a slow movement, the air movedbefore the piston in its upward stroke may iiind..

IOO

It Will i rotation as occurs from the time the piston commences its downstroke until it reaches the aperture c in its up-stroke,-abouteightninths of its revolution,-will be stored up by such balance wheeland by the momentum of the wheel rendered available in the last part ofthe revolution of the last ninth of the forcing stroke of the piston. Ifnow the speed of the wind and consequent rotary speed of the millincreasesso that the movement of the piston forces the air before itmore rapidly than it can escape freely,-that is, without appreciablecompressiom-through the aperture, a degree of compression will beproduced before the piston reaches that aperture, and a correspondinglyincreasd quantity of air will be compressed in the remaining ninth ofthe stroke after the piston passes the aperture, The degree of tensionwhich occursbefore the aperture is passed will increase more rapidlythan the increasein velocity. For the purpose of the presentexplanation, it is not necessary to consider just what the rate ofvariation may be; but it will be obvious that even with this simpleconstruction,-that is, with a mere aperture located as described, anapproach will be made toward the result sought,-viz: increasing theworking capacity of the appliance as the potential energy of the windincreases; but for more perfectly attaining the result, I cause theaperture c to lead into a small supplemental chamber M, which dischargesto the outer air through the port M', which is closed by an upwardlyseating valve M2, located within said supplemental chamber. I describeand illustrate this as an upwardly seating valve, but the essentialcharacteristic which is involved in that description is that it isnormally open and requires some force to close it. The position of thevalve in respect to the aperture c is such that the jet of airdischargedthrough c is experienced by the valve and tends to seat it. Asillustrated, this is accomplished by providing the valve with aprojection on the side opposite its seat, which stops against the bottomof the chamber, and making the aperture c enter the chamber at thebottom, so that the jet of air discharged through the aperture isdischarged under the valve, and it may be discharged upward under andtherefore against the valve, but this is not essential to practicalresults, though it might tend to make the valve more sensitive. Now,when the speed of the piston is such as to force the air through theaperture c without any appreciable compression, it will also pass outaround the valve M2 without any appreciable tendency to lift it, butwhen the air is discharged after being somewhat compressed, it will tendin passing around the valve to lift it, and, after a certain degree ofcompression is reached, it will lift and seat it. This will occur at agreater or less interval after the commencement of the forcing stroke ofthe piston, according as that stroke is less or more rapid, and after itoccurs, the

piston will operate throughout the remainder ofv its stroke as thoughthere were no aperture-that is, the remainder of its stroke after thevalve thus seats will be as completely or unqualiliedly a forcing orcompressing stroke as is the portion of its stroke which it makes afterthe aperture c is passed when it moves slowly. Since the movement'of thepiston in the cylinder is most rapid at the time the crank wrist isninety degrees from its lowest position, itwill be evident that as thespeed of the mill rises, the longitudinalv speed of the piston in thecylinder will first become sufficient to produce compression of the air,at that middle point of some forcing stroke, and, therefore, that thevalve M2 will be first seated as the speed rises, when the piston is atsome point. between that middle point and the aperture 0;*(that is,unless the change of speed should be so sudden as to be very widelydifferent at two consecutive strokes), and it is evident that as thespeed continues to rise, the valve will close with the pistonsuccessively at a lower and lower position in its forcing stroke, untiliinally, at the maximum speed, it will close almost instantly upon thecommencementk 'of that stroke. Thus, the effective length of the forcingstroke, which, at the Iirst, is only the distance from the aperture c tothe top of the cylinder, will increase as the velocity of the windincreases, until, at the maximum velocity, it is the entire stroke ofthe piston. By properly relating the size of the aperture cto thecapacity of the cylinder, and the weight of the valve to both thecylinder and aperture, I nd that I can cause the length of this forcingstroke,-that is, the portion of the entire stroke which is effective incompressing the air, to vary approximately as the square of thevelocity; and, comparing the two limits,-that is, the minimum andmaximum compressing stroke,- that result is perfectly attained atthoselimits by making the distance of the aperture c from the upper end ofthe cylinder proportioned to the entire stroke of the piston in thecylinder as the squares of the minimum and maximum velocities of windwhich it is designated to utiliza-that is, the maximum wind being doublethe minimumlocating the aperture one-fourth the way down from the top,or, the maximum wind being three times the minimumflocating it one-ninththe way down, and so on. I have shown in the drawings this aperture infull lines at the former position and in dotted lines at the latter. Itwill be observed that to some extent the aperture c may serve as anintake aperture, and that, when it is present, it is not impossible todispense with the ordinary intake aperture and valve in the piston head.The wind may be made to actuate the vent valve directly to cause it toclose when a given velocity of wind is attained even tliou'ghtheresulting speed of the piston in the cylinder may through any retardingcause be insufficient to seat that valvein the man- IOO iro

ner described. For such a purpose the bellcrank-lever N, pivoted outsidethe cylinder and having one arm connected to the stem of the valve M2,carries upon its other arm a vane N', exposed to the wind,-that is,facing the same direction as the windmill. The arm to which the stem ofthe valve M? is connected may be provided with a weight N2, adjustabletoward and from the fulcrum of the lever to vary its counteracting forceagainst the wind pressure experienced by the vane. The connection of thevalve stem to the lever should be made by a pin through a verticallyslotted aperture in either the lever or the stem, so that the vent valvemay be free to rise to its seat whether the lever moves or not, but sothat the rising of the lever will, in any event, lift the valve. It willbe understood that a weight being adjusted on the lever arm, so that agiven velocity of wind will rock the lever, the vent valve will beseated whenever this velocity is attained, and will be held thus seatedthroughout the entire stroke of the piston and so long as the velocityof the wind does not fall below thatto which the weight is adjusted.This appendage is occasionally useful when the work being done is suchthat the quantity of air forced out of the cylinder rather than thetension produced is material, or to prevent any loss of air through thevent valve when the wind reaches or exceeds the maximum limit.

Before proceeding to the description of the third essential feature ofmy invention, I will describe certain details of the constructionillustrated, which I deem of some practical importance.

The intake valve D in the piston is cast with the intersecting guidewebs d10 forming its stem integrally with the head or body of the valvewhich seats downward upon the upper side of the piston head. This valveis retained in its place in the piston head by means ofthe pin du, whichis inserted through an elongated aperture or slotcllz, made throughbot-h the webs d10 at their intersection, the elongation of said slotbeing suiiicient to allow for the proper opening of the valve. A seat isformed for the ends of the pin d in the following manner :-The pistonhead being formed of two members D2 and D3, as de-V scribed, forconvenience of binding between them the packing D4, the upper member D2is chambered out at d2, around the eduction aperture d', forming theshoulder d20, and the lower member D3 is formed with an annular boss d3,which fits the chamber (Z2, and at diametrically opposite points in saidboss are formed two notches C130, adapted to admit and afford lodgmentfor the ends of the pin du. The wall of the chamber cl2 is cut away atone side at dm, and the valve is put into place by having its stem,which is made up of the intersecting webs d10, passed down from abovethrough the @duction aperture d', and the pin du is inserted from belowthrough the slot d `from the side at which the recess dm is cut,

said recess forming a path for the end of the pin until it reaches itslodgmenton the shoulder d20, and the lower member of the head being putinto place, the notches d3@ engage the ends of the pin and fix itpermanently in place. By this construction, I avoid all screwconnections for the valve D', and am able to make it of one piece, whichis of some importance in view of the fact that this valve is in constantaction while the pump is operating and if made in two pieces or withscrew joints would be quite liable to get out of order.

Then I employ the construction shown in Fig. 8, wherein a rod within thetubular stem serves to communicate the motion from the piston-actuatingpart to the intake valve, it is essential, of course, that such rodshould not obstruct the induction passage to such tubular stem, and atthe same time, that it should itself be guided with reasonable accuracyin its longitudinal movement within the stem, and to meet theseconditions, I make said rod to consist of three diverging Webs, whichcontact with the inner wall of the stem and thereby guide the rodlongitudinally therein without closing it. As a speciiic form,

which is convenient and cheap, such rod may be made of sheet metal byfolding a strip of such metal upon itself forming the double web K',then spreading apart each of the folds to form the two webs KZKB. I makethe web K' enough wider than the radius of the pipe or tubular stem sothat the pin d2, which passes transversely through the center of thepipe, need penetrate only this one web.

For the purpose of lubricating the piston and cylinder, I provide theannular oil cup C4, which is upwardly open within the cylinder at thelower end of the latter, so that the piston dips itsdownwardlyflangedorextended edge into the cup at the lowest limit of its stroke, and thateach dip takes up oil to lubricate its path. The cup C4 is preferablymade separable from the cylinder and may be secured thereto by boltsthrough the correspending horizontal flanges c4 040 on the cylinder andcup respectively.

I claiml. In an air compressor, in combination with the cylinder and thepiston reciprocating therein, said cylinder having a vent aperture, avalve which controls such vent adapted to be normally open and to beclosed by outward movement of air through the vent passage; whereby suchvent is closed earlier or later in the forcing stroke according to thespeed of the piston in said stroke: substantially asset forth.

2. In combination with a windmill, an air compressor comprising acylinder and piston reciprocating therein; and connections from thepiston to the windmill, whereby the rotatation of the latterreciprocates the former; the cylinder having a vent aperture locatedfrom the limit of the forcing stroke of the pisi ton, but in suchposition that itis covered by the piston before the latter reaches saidlimit;

d anda valve which controls said vent adapted to be normally open and tobe closed by outward movement of air through the vent passage,Wherebysuch vent is closed earlier or later in the forcing strokeaccording to the speed of the piston in said stroke: substantially asset forth'.

4. In an air compressor, in combination substantially as set forth, acylinder and the pis-v ton playing therein, the cylinder having ay ventaperture at aL sho-rt distance from the,-

limit ofthe path of the piston in its forcing stroke-,leading to theouter air, but at such position as to be covered by the piston before itreach-es that limit; whereby the minimum amount of air compressed by theforcing stroke is that which is confined by the piston beyond said vent,and themaximum amount depends upon the yspeed ofthe pistonv in saidstroke.

5. In an air compressor, .the cylinder and piston playing therein, thecylinder having a vent aperture at ay short distance from the limit ofthe path ofl the piston in its forcing stroke, combi-nedwith a valvewhich controls saidvent aperture and is normally open, and adaptedto beclosed by discharge through such aperture; whereby the minim um amountof air compressed by the piston in its forcing stroke lis that which isconfined by the Vpiston afterit passes the vent aperture, and themaximum is kthat Which is confined by it after-its movement has seatedthe vent valve: substantially as set forth.

6. In an air compressor, in combination with the piston and thepiston-actuator, a spring which transmits motion from saidpiston-actuator to the piston in the forcing stroke of the latter, andthe piston intake valve actuated by the. piston-actuator when the latterpart is moved longitudinally relatively to the piston; whereby suchintake valve is opened when the spring yields to permit such relativemovement of said piston-actuator: substantially as setforth.

7. In an air compressor, in combination with the piston a pitman looselypivoted thereto to reciprocate it, a spring reacting between the. pitmanand piston to force the latter awa-y from the former in the direction ofthe forcing stroke of the piston to the limit permitted by said loosepivotal connection; and the pistonintake valve near enough to thepitman'to be actuated thereby when the pitman moves lrelatively tothe'piston in the direction of the forcing lstroke of the flatter-as faras said` loose pivotal connection permits: substantially as and forthepurpose set forth.

8. The compressor cylinder, the pistontherein having the pivot D5,the-pitman having the elongatedeye B', by which it is connected to thepiston at said pivot; the-intake valve D being adapted to be encounteredby the pitman when the latter moves longitudinally on thel pivot tothelim-it of.. saidy elongated eye, combined with the springG, reactingbetween the pivot and the pitman to holdthe latterbaok from said intakevalve: substantially as set forth.

In testimony whereof Ifhave `hereunto set my hand, at` Chicago,Illinois, in the presence of two witnesses, this lst day of September,A. D. 189,1.

THOMAS O. PERRY.

Witnesses:

OSCAR LAEDERACH, FRED E. SMITH.-

